Sewing machine



FIG. 1 is a front perspective view showing my new design for a sewing machine,

FIG. 2 is a front view thereof,

FIG. 3 is a rear view thereof,

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof,

FIG. 6 is a top view thereof,

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view thereof, with the three side flaps shown in an alternate position. 

CLAIM The ornamental design for a sewing machine, as shown and described. 